How Do You Troubleshoot A Dual Battery Isolator?
A battery isolator is an important part of a multi-battery electrical system. When it is operating properly, it ensures that both vehicle batteries are charging when they should be, and that the vehicle’s main battery will have enough juice to start the car in the event that the accessory battery has been drained. If the isolator is not operating properly, a number of problems can occur. Being able to troubleshoot an isolator may be the difference between your car starting or not starting at all. Understand that a standard battery isolator has four contacts, two large contacts and two smaller ones. To start, disconnect the large gauge cables from the larger contacts. These cables lead to each battery’s positive terminal, so care must be taken to keep the end of the cables from grounding out on the exposed metal of the engine compartment. Use the electrical tape to cover these ends. Place your meter leads on the large contacts that were previously attached to the batteries. Trigger the
